I purchased this because I like the simple lid with a loop. The lid screws on and off smoothly and it looks like it will be easy to keep clean, as there are not too many crevasses and no fiddly parts. I bought to use as a water bottle only, not to keep liquid cold or hot. (Out of interest though, I tested how long this could keep hot water hot, against a new steel Thermos bottle, and my old Aladdin insulated flask with inner glass globe, all similar sizes, and the Aladdin won hands down.)